Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The commencement of December indicates a gentle shift in the average high-temperature, receding from November's agreeable 68.7°F (20.4°C) to a comfortable 61.3°F (16.3°C). Mystic records a steady low-temperature average of 46.4°F (8°C) during December.Humidity
In December, the average relative humidity is 80%.Rainfall
In Mystic, during December, the rain falls for 12.3 days and regularly aggregates up to 2.24" (57mm) of precipitation. Throughout the year, there are 163.9 rainfall days, and 27.01" (686mm) of precipitation is accumulated.Snowfall
January and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. In Mystic, during the entire year, snow falls for 0.7 days and aggregates up to 0.2" (5mm) of snow.Daylight
The month with the shortest days is December, with an average of 10h and 12min of daylight.On the first day of the month, sunrise is at 6:54 am and sunset at 5:12 pm. On the last day of December, sunrise is at 7:11 am and sunset at 5:23 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 4.9h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 3 during December leads to these advisories:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the average humidity in December?
How many days does it rain in December?
When does it start to snow?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Mystic have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Mystic, LA
- Average high temperature in December: 61.3°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in December: 46.4°F
The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in December
Mystic, LA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Mystic, LA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Mystic, LA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Mystic, LA
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is August (4.37").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in December
Mystic, LA
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is August (20.3 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in December
Mystic, LA
- Average snowfall in December: 0.08"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Mystic, LA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, October and November (0 days).
Average daylight in December /
Average sunshine in December
Mystic, LA
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Mystic, LA
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is January (18.6 days).
The month with the least sunshine days is August (7.6 days).
Average UV index in December
Mystic, LA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Mystic, LA
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in December
Mystic, LA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
Mystic, Louisiana, USA
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